Abstract
Suction and discharge processes with self actuated valves have a major influence in efficiency and reliability of hermetic reciprocating compressors. Understanding the operation completely in order to enhance compressor’s design needs precise prediction of the fluid-structure interaction complexities involved in these processes. This paper presents a comprehensive description of a numerical methodology to account for the coupled behaviour of a reed valve and a turbulent flow. The method is based on a partitioned semi-implicit scheme that only strongly couples the fluid pressure term to the structural solver. A three-dimensional CFD analysis with LES turbulence modelling is used for the flow while a combination of plate theory and mode summation method is used for the solid. The dynamically changing domains are tackled by means of lagrangian and arbitrary lagrangian-eulerian approaches for the solid and the fluid, respectively. The whole model is compared with experimental data at Reynolds number 10, 000, showing good agreement in lift amplitude and deformation fluctuations. Finally, as an illustrative case, results regarding lift, pressures, force and effective areas are compared with those of a valve with wider gland.
Highlights
Design of reed valves is a challenging task and is of great relevance for the overall performance of hermetic reciprocating compressors [1, 2]
This paper presents a comprehensive description of a numerical methodology to account for the coupled behaviour of a reed valve and a turbulent flow
A three-dimensional computational fluid dynamics (CFD) analysis with LES turbulence modelling is used for the flow while a combination of plate theory and mode summation method is used for the solid
Summary
Design of reed valves is a challenging task and is of great relevance for the overall performance of hermetic reciprocating compressors [1, 2]. They are involved in suction and discharge processes, which are responsible for nearly half of the total thermodynamic losses of the compressor [3]. In the last years, following an enhance in computational resources, a growing research on 3D computational fluid dynamics (CFD) simulations for valve flow has been carried out. A verified fluid-structure interaction (FSI) model, which strongly couples both 3D CFD and finite element structural solvers, was thoroughly explained and used for reed valves in [7].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IOP Conference Series: Materials Science and Engineering
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
